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(No Model.) 4 Sheets-Sheet 1i.

J. 11. MORGAN. OVERHEAD TRAVELING CRANE.

No. 486,117.7 Patentgd'Nov. 15, 1892.

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(No Model.) 4 Sheets-Sheet 2.

J. R. MORGAN.

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110.486,11?. Patented Nov. 15,1892.

(Nvo Model.) 4 Sheets-Sheet 3.

J. R. MORGAN.

OVERHEAD TEAVELING CRANE. 110.486,11?. L* Patented. NOV. 15,1892.,

(No Model.) 4 Sheets-Sheet 4.

' J. R. MORGAN.

y OVEEEEAD TEAVEEING GEA'NE. n `1\Io.l1.86,117.l y Pawnted Nov.. 15,.1892.

NrTED ESTATES `PATENT OFFICE.

JOHN R. MORGAN, OF ALLIANCE, OHIO, ASSIGNOR OF THREE-FOURTHS TO THOMASR. MORGAN, SR., THOMAS R. MORGAN, JR., AND WILLIAM H.

MORGAN, OF SAME PLACE.

OVERHEAD TRAVELING CRANE.

SPECIFICATION forming part of Letters Patent No. 486,117, dated November15, 1892.

Application filed July 27I 1891. Serial No. 400,794. (No model.)

To all whom 'it may concern,.-

Beit known that I, JOHN R. MORGAN, of Alliance, in the county of Starkand State of Ohio, have invented certain new and useful Improvements inOverhead Traveling Cranes; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use the 1osame. y

My invention relates to an improvement in overhead traveling cranes.

In overhead traveling cranes consisting, essentially, of a bridgemounted on wheels, the

r 5 latter running on tracks placed lengthwise the shops, and a trolleymounted on the bridge and adapted to travel lengthwise the bridge thetracks on which the bridge travels are usually placed adjacent to theside walls of 2o the building, so as to bring the entire iioorspace ofthe shop or foundry within reach of the lifting-chains carried by thetrolley. The length of the bridge depends upon the width of thebuilding; but in all cases the bridge is supported solely at its endsand is of such length that there is a slight deflection of the girdersand the beam supporting the main chain-blocks when the crane issustaining its maximum load, and as the movement of the parts on thetrolley are imparted by parts carried bythe girders or bridge it followsthat any deflection of the bridge would naturally cause parts to bindand also cause the trucks carrying the bridge to tilt inwardly.

The object of this invention is to provide means for compensating forthe deflection of the bridge and beam on the trolley for supporting themain-chain blocks; and it consists in the parts and combinations ofparts, as will 4o be more fully described, and pointed out in theclaims.

In the accompanying drawings, Figure l is a view in end elevation,partly in section, showing the trucks supporting one end of the bridge.Fig. 2 is a plan view of one of the trucks, partly in section. Fig. 3 isan end View; and Fig. 4 is a transverse section of the bridge, showingthe trolley in elevation.

A represents a trackway for the trucks, on

5o which one end of the bridge rests, the opposite ends of the bridgeresting on trucks mounted on a similarlyconstructed trackway. (Notshown.) Each trackway consists of parallel rails suitably secured tosupports located ordinarily near the side walls of the building, and thebridge is preferably supported on two trucks at each end, each truckhaving four wheels arranged in pairs, as shown. One wheel of each pair,and preferably the outer wheels, is provided with two 6o flanges adaptedto closely embrace the sides of the tread of the rail and absolutelyprevent one end of the bridge from moving faster than the other end andalso prevent lateral movement of the trucks. The other wheels can haveflat treads, and hence if the rails are slightly out of line will notaffect the movement of the bridge. Located in a line passing between therails of one trackway is an angular shaft C3, which latter is rotated by7o any suitable power and imparts motion to the movable parts on thebridge by means of a sleeve O4, carried by one of the trucks. Thissleeve is free to slide on the shaft C3, but is provided with a borecorresponding in crosssection'to a cross-section of the angular shaft,and hence it follows that when the angular shaft is rotating the sleeveis also in motion. Rigidly secured to the sleevev is a toothed wheel,which latter by means of suitable gear- 8o ing (not necessary to bedescribed here) imparts motion to the mechanism for driving the bridgeand trolley.

The wheels O C of one truck at each end of the bridge are provided ontheir outer faces 8 5 with bevel-wheels D, which latter mesh withbevel-pinions E, secured to shafts E. These shafts E of thedriving-trucks at the opposite end of the bridge are coupled up so as tomove in unison, and thereby impart uniform 9o movement to both ends ofthe bridge.

As before stated, each end of the bridge is supported on two trucks.Each truck consists of a truck-frame G and four wheels arranged inpairs, as described, and each truck is provided near its ends, andpreferably at points over the axles of the wheels, with bed-plates H,each having a rounded concaved upper surface, the said concave surfacesbeing conoentric with the laxis of the roo first driving-shaft H', whichlatter is carried on the bridge and is provided with spurwheels, andthrough the aid of intervening spur-wheels impart motion to the shaftsE. The bridge consists, primarily, of two girders I, (see Fig. 4,)rigidly secured together at their ends by end girders or beams J. To theunder side of the end girders J, at each end of the bridge, are securedfour bearingblocks K, having convex bearing-surfaces which are adaptedto rest or bear in the corresponding concave bearing-surfaces of thebed-plates H on the trucks G. These bearings or blocks overlap the endsof the bedplates I-I and are provided on their under sides with curvedor convex surfaces, which latter snugly t the curved faces of thebedplates. Vhile I have shown four bed-plates and four blocks supportingeach end of the bridge, it is evident that I can increase or decreasethe number as necessity demands. The end girders or beams .I rigidlyconnect the two girders or sides of the bridge, and the blocks orbearings thereon rest on the bed-plates, and as the blocks overlap thebedplates and as the bed-plates and blocks are curved it follows thatdisplacement of the bridge is impossible under ordinary conditions. Theconnection, however, between the trucks and girders is a looseconnection, and hence it follows that the bridge is free to defleetunder the strain of a load without tilting the trucks and withoutstraining the gearing connecting the angular driving shaft and themovable parts on the trucks. The bridge is also provided with a doubleset of tracks, on which the trolley M moves. The rails are preferablyarranged in pairs on top of and lengthwise the girders, and the truck ofthe trolley Mis provided on each side with wheels arranged in pairs,adapted to travel on the rails. The trolley is moved by suitable devices(which form no part of the present invention) from one end of the bridgeto the other, and is provided with one or more winding-drums N, aroundwhich the lifting-chain is wound and to which it is secured, and is alsoprovided on its opposite sides with the blocks O, provided with concavedor curved seats for the reception ofthe convex or curved faces of theblock O', secured to the beam O2, which latter carries the main-chainblock O3. This beam sustains a part of the load and is bound to bedeiiected, owing to the shock, and by providing it and the truck of thetrolley with compensating bearings, whereby the beam can give withouttilting the truck, the trolley frame or truck is relieved of all lateralstrain due to the deflection of the beam, and by providing compensatingbearings between the bridge and bridge-supporting trucks the bridge cangive without tilting the trucks. Hence under all conditions the weightis equally supported on all wheels of the trolley and bridge trucks.

I make no claim in this application to the gearing for driving thetrucks, as the same is claimed in application, Serial No. 404,321, filedAugust 3l, 189i.

It is evident that numerous slight changes and alterations might beresorted to in the relative arrangement of parts shown and describedwithout departing from the spirit of my invention. Hence I would have itunderstood that I do not strictly confine myself to the parts hereinshown and described; but,

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. In an overhead traveling crane, the combination, with tracks andtrucks thereon, the latter having curved seats, of a bridge provided atits ends with curved bearings resting loosely on the curved seats on thetrucks and free to slide on said curved seats and a movable trolley onthe bridge.

2. The combination, with trackways, each consisting of parallel rails,and trucks mounted on said trackways, of a bridge the ends of which restloosely on said trucks and free to slide thereon to allow the bridgetogive or yield undera load, substantially as set forth.

The combination, with trackways, each consisting of parallel rails, andtrucks mounted on said trackways, of a bridge loosely mounted at itsends on the trucks and adapted to have a sliding movement on saidtrucks, as described, and a movable trolley carried by the bridge,substantially as set forth.

4. The combination, with trackways and trucks thereon, each truck havingcurved seats, of a bridge provided at its ends with bearing-blocksshaped to conform to the curvatu re of the seats and resting looselythereon and a movable trolley on the bridge.

5. In an overhead crane, the combination, with a traveling trolley, thelatter having curved seats,of a chain-block beam provided at its endswith curved bearings restingloosely on the curved seats of the trolleyand free to slide on said curved seats.

6. The combination, with a movable bridge and a movable trolley thereon,the said trolley being provided on its opposite sides with curved seats,of a chain-block beam having curved bearing-blocks conforming in shapeto the curved seats and loosely resting thereon.

7. The combination, with trackways, each consisting of parallel rails,and trucks mounted on said trackways, of a bridge the ends of which restloosely on the trucks, double trackways on the bridge, a trolley on saiddouble trackways, and a chain-block beam loosely resting on the trolley,su bstantially as set forth.

S. The combination, with traekways, each consisting of parallel rails,and trucks mounted on said tracks and provided with curved seats, of abridge provided at its ends with curved bearing-blocks, which latterrest on the curved seats of the truck, a movable-trolley onv the bridge,and a chain-block beam loosely supported on the trolley.

9. The combination, with two trackways, each consisting of parallelrails, and an an- IOO trucks on the traokwa'ys, a bridge loosely mountedat its ends on said trucks, and means 15 for transmitting the motion ofthe angular driving-shaft to the movable parts on the bridge.

In testimony whereof I have signed this specification in the presence oftwo subscrib- 2o ing witnesses.

JOHN R. MORGAN.

Witnesses:

T. R. MORGAN, Sr., F. E. DUssEL.

